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chromium/third_party/blink/web_tests/svg/foreignObject/z-index-crash.html 

<!doctype HTML>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
Passes if it does not crash.
<svg>
  <style>
  </style>
  <foreignObject style="z-index: 0">
    test
  </foreignObject>
</svg>
<script>
  test(() => { }, "No crash or assertion failure.");
</script>